Does an iPhone restore from backup move the phone number?

I recently moved to the iPhone 5(and switched numbers), but I need information from an iTunes backup of my old iPhone 4.

If I temporarily restore from the old backup, grab the info, and re-restore it to what it is now, will my phone go back to the old number or keep my current for that small amount of time? I realize normally phone numbers carry with the SIM card, but I'd rather ask and know for sure.

Also, both phones were running the newest iOS 6.0 so I will not be switching between OS's - if that even matters…

The number is not affected by an iTunes back up. Nor can it be in the same regard. Your number on your SIM stays there for life & can't be affected, except only by the carrier.

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